The Downtown Line (DTL), will be the fifth Mass Rapid Transport line in Singapore, currently under construction, it will open up in phases, such as Stage 1 in 2013, Stage 2 in 2015 and Stage 3 in 2017. The operator of this line is appointed in Augist 2011 and is currently operated by SBS Transit, subsequently changed the color of this MRT line from brown to blue.

Stations in operational lines that are denoted in italics either they are yet to be opened or have yet to be confirmed as they are currently under planning.
Only the listed stations have been confirmed as part of the line.